T-SIM7670G Parameters:MCU: ESP32-53; LTE&GSM: SIM7670G; TF Card slot; SIM7670G Composition: +LGA; SIM7670G Use area: Global ESP32-S3 Parameters:Clock frequency: 240Mhz; Flash: 16MB; PSRAM: 8MB; Supported wireless communication protocols: 2.4 GHz Wi-Fi (802.11 b/g), Bluetooth 5 (LE);Serial bus communication protocols: I2C, SPI, UART, SDIO, I2S, CAN SIM7670G Parameters: Frequency: LTE-FDD: B1/B2/B3/B4/B5/B7/B8//B13/B18/B19/B20/B25/B26/B28/B66 LTE-TDD: B34/B38/B39/B40/B41 Data transmission: Download speed: 10Mbps, Upload speed: 5Mbps GNSS: NA Supported protocols: IP/IPV4/IPV6/Multi-PDP/ FTPS/https/httpsS/DNS/ Android RlL: Android 5.0/6.0/7.0/8.0/9.0 USB driver: 7/8/10, Linux, Android Supported voltage: 3.4~4.2V Card: 1.8V/3.0V If you need technical support please check below link to find more details. httpss://github.com/-/-T-A76XX Different batches may have different screen printing/appearance, but it will not affect the use Colour:Black Material:PCB+electronic components Package Contents: 1 x development board 1 x antenna 1 x battery cable 2 x pin headers 1 x GPS antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.